So it’s weird for me to tell UK students to do maths, as in Ireland maths is compulsory all the way to A Level for all students, so I just assumed it was the same everywhere! Maths is very important, for everything.
For marine biology you should certainly do biology. I am not sure if physics, chemistry or both would be a good supplement to that, as I’m not a marine biologist, but maybe there is one amongst the other scientists who can give more advice on that. I suspect chemistry might be more useful than physics for you, in addition to biology (and of course maths!!).
I would say that you absolutely need maths and biology – perhaps geography would be useful too – otherwise, it is probably more important to do well enough in your GCSEs to go on to do A-levels. Do what you enjoy and what you are good at.
Hey Holly, I always wanted to be a marine biologist when I was younger! I used to write books about dolphins and stick pictures of dolphins and porpoises in it with my friend! Anyway, to be a marine biologist you will definitely need your sciences, maths and english for sure. I don’t think it would make a different if you did Geography or History though, but if you aspired to work in marine biology say abroad and you were good at a language, maybe doing geography and a language? That would be super cool!
I studied in Scotland so I did Standard Grades which I believe are the equivalent to GCSEs. I would agree with everyone else’s answers that Maths, English and some Science subjects are essential but to give yourself some other subjects that you enjoy too!
Just as a reference I studied English, Maths, French, Biology, Chemistry, History, Modern Studies (Politics) and Art at Standard Grade/GCSE. Then I studied Maths, English, Biology, Chemistry, Drama, Sociology and History at Highers and Maths and Biology at Advanced Higher level (I think A levels are around Higher/Advanced Higher level).
When I applied for my BSc in Marine Biology the requirements at the university I attended were 5 highers at B which had to include English, and two sciences (where Maths is included as a science).